阅读说明：本技术 空间弦支钢-混凝土组合楼盖 (Space chord steel-concrete composite floor ) 是由 安琦 王燕 于 2019-08-16 设计创作，主要内容包括：本发明提出一种空间弦支钢-混凝土组合楼盖,属于建筑物楼盖建造技术领域,其索杆体系呈三维立体空间布置,且其撑杆、拉索布置简洁,具有空间传力特征,跨越能力较强。该空间弦支钢-混凝土组合楼盖,包括自上而下设置的混凝土盖板、钢梁网格和索杆支撑组件,钢梁网格贴合并固定连接于混凝土盖板的底面,索杆支撑组件包括撑杆、矩形环向索和斜向索；矩形环向索设为多圈,多圈矩形环向索共平面且同心设置；撑杆的顶端连接于钢梁网格的节点,底端连接于矩形环向索的顶点；斜向索包括第一斜向索和第二斜向索,第一斜向索连接于相邻两圈矩形环向索的相对顶点处设置的两根撑杆之间,第二斜向索连接于位于最外圈的撑杆与靠近该撑杆的钢梁网格顶点之间。(the invention provides a spatial chord steel-concrete composite floor, belonging to the technical field of building floor construction. The spatial chord steel-concrete combined floor comprises a concrete cover plate, a steel beam grid and a cable support component, wherein the concrete cover plate, the steel beam grid and the cable support component are arranged from top to bottom; the rectangular circumferential cables are arranged in a plurality of circles, and the circles of the rectangular circumferential cables are coplanar and concentrically arranged; the top ends of the support rods are connected to the nodes of the steel beam grids, and the bottom ends of the support rods are connected to the top points of the rectangular annular cables; the oblique cables comprise a first oblique cable and a second oblique cable, the first oblique cable is connected between two support rods arranged at opposite vertexes of two adjacent circles of rectangular annular cables, and the second oblique cable is connected between the support rod positioned at the outermost circle and the top point of a steel beam grid close to the support rod.)

1. Space string props up steel-concrete combination superstructure, its characterized in that: the cable bar supporting assembly comprises a supporting rod arranged perpendicular to the bottom surface of the concrete cover plate, a rectangular annular cable arranged parallel to the bottom surface of the concrete cover plate and an inclined cable arranged at an angle with the bottom surface of the concrete cover plate; the rectangular circumferential cables are arranged in a plurality of circles, the circles of the rectangular circumferential cables are coplanar and concentrically arranged, and the rectangular circumferential cables and the bottom surface of the concrete cover plate are coaxially arranged; the top ends of the support rods are connected to the nodes of the steel beam grids, the bottom ends of the support rods are connected to the top points of the rectangular circumferential cables, and one support rod is arranged at each top point of each circle of the rectangular circumferential cables; the oblique cables comprise a first oblique cable and a second oblique cable; the first oblique cable is connected between two support rods arranged at the opposite vertexes of two adjacent circles of rectangular annular cables, one end of the first oblique cable is connected to the bottom end of the support rod positioned at the inner circle, and the other end of the first oblique cable is connected to the top end of the support rod positioned at the outer circle; one end of the second oblique cable is connected to the bottom end of the stay bar positioned at the outermost ring, and the other end of the second oblique cable is connected to a node at the top point of the steel beam grid close to the stay bar.

2. The space string props up steel-concrete composite superstructure of claim 1, characterized in that: the vaulting pole includes the body of rod, body of rod top install can for the universal pivoted universal steering spare in body of rod top, the top fixed connection of universal steering spare in the node of girder steel net, body of rod bottom is equipped with and is used for connecting the cable clamp of rectangle hoop cable, all be equipped with on universal steering spare and the cable clamp and be used for connecting the first otic placode of slant cable.

3. The space string props up steel-concrete composite superstructure of claim 2, characterized in that: the top end of the rod body is provided with a connector, and the connector is in a segment shape larger than a hemisphere; the universal steering part comprises a connecting rod, the top end of the connecting rod is fixedly connected to the grid node of the steel beam, the bottom end of the connecting rod is connected with a connecting sleeve, the connecting sleeve is provided with a ball socket matched with the shape of the connecting head, and the opening of the ball socket is downward; the connector of the rod body is sleeved in the ball socket, and the rest part of the rod body extends out of the opening of the ball socket.

4. The space string props up steel-concrete composite superstructure of claim 2, characterized in that: the top surface of the cable clamp is provided with a connecting groove for accommodating the vertex angle part of the annular rectangular cable, and the cable clamp is detachably connected to the bottom of the support rod through a bolt.

5. The space string props up steel-concrete composite superstructure of claim 1, characterized in that: and a second lug plate used for connecting the second oblique cable is connected to a node at the top point of the steel beam grid.

6. The space string props up steel-concrete composite superstructure of claim 1, characterized in that: and a plurality of circles of the rectangular annular cables are sequentially arranged at equal intervals from inside to outside.

7. The space string props up steel-concrete composite superstructure of claim 1, characterized in that: the first oblique cable and the second oblique cable which are connected to the same support rod are arranged in parallel.

Technical Field

The invention belongs to the technical field of building floor construction, and particularly relates to a space chord support steel-concrete composite floor.

Background

With the rapid development of the economic, social, cultural, sports and other careers in China, large-scale public buildings are constructed on a large scale, and meanwhile, higher requirements are provided for large-span floor structures. The existing large-span floor system has few structural forms and mainly comprises a traditional prestressed reinforced concrete floor system, a steel-concrete composite floor system, a steel net rack-concrete slab composite floor system and a novel open web grid floor system and a string supporting steel-concrete composite floor system.

the chord support steel-concrete composite floor system combines the concrete floor system, the steel beam, the stay bar and the stay cable, belongs to a composite structure, realizes 'rigidity and flexibility', can fully play the advantages of high compression strength of concrete materials and high tension strength of steel materials and stay cable materials, can reduce the dead weight of the structure to a greater extent, has higher structural efficiency and has wide application prospect. At present, a chord support steel-concrete composite floor is only in the form of a one-way chord support floor structure, a main bearing unit of the one-way chord support floor structure is a planar structure system, a cable rod system is single in arrangement and easy to deform outside the surface, and in order to prevent the cable rod system from deforming outside the surface, an outside-surface stable cable is often required to be arranged, so that a plurality of struts and cables are arranged.

Therefore, how to provide a chord support steel-concrete composite floor with a simple structure and a three-dimensional space structure system and how to improve the structural efficiency and the spanning capability of the chord support steel-concrete composite floor are all technical problems which need to be solved urgently at present.

Disclosure of Invention

The invention provides a spatial chord steel-concrete composite floor system aiming at the defects that a cable-rod system of the existing plane structure system chord support steel-concrete composite floor system is easy to generate out-of-plane deformation and stay cables are complex to arrange, wherein the cable-rod system is arranged in a three-dimensional space, the out-of-plane deformation in the plane structure system can not occur, and the stay rods and the stay cables are simple to arrange, have the characteristic of spatial force transmission and have stronger spanning capability.

In order to achieve the purpose, the invention adopts the technical scheme that:

The spatial chord steel-concrete combined floor comprises a concrete cover plate, a steel beam grid and a cable support assembly, wherein the concrete cover plate, the steel beam grid and the cable support assembly are sequentially arranged from top to bottom; the rectangular circumferential cables are arranged in a plurality of circles, the circles of the rectangular circumferential cables are coplanar and concentrically arranged, and the rectangular circumferential cables and the bottom surface of the concrete cover plate are coaxially arranged; the top ends of the support rods are connected to the nodes of the steel beam grids, the bottom ends of the support rods are connected to the top points of the rectangular circumferential cables, and one support rod is arranged at each top point of each circle of the rectangular circumferential cables; the oblique cables comprise a first oblique cable and a second oblique cable; the first oblique cable is connected between two support rods arranged at the opposite vertexes of two adjacent circles of rectangular annular cables, one end of the first oblique cable is connected to the bottom end of the support rod positioned at the inner circle, and the other end of the first oblique cable is connected to the top end of the support rod positioned at the outer circle; one end of the second oblique cable is connected to the bottom end of the stay bar positioned at the outermost ring, and the other end of the second oblique cable is connected to a node at the top point of the steel beam grid close to the stay bar.

Preferably, the vaulting pole includes the body of rod, body of rod top install can for the universal pivoted universal steering spare in body of rod top, the top fixed connection of universal steering spare in the node of girder steel net, body of rod bottom is equipped with and is used for connecting the cable clamp of rectangle hoop cable, all be equipped with on universal steering spare and the cable clamp and be used for connecting the first otic placode of slant cable.

preferably, the top end of the rod body is provided with a connector, and the connector is in a segment shape larger than a hemisphere; the universal steering part comprises a connecting rod, the top end of the connecting rod is fixedly connected to the grid node of the steel beam, the bottom end of the connecting rod is connected with a connecting sleeve, the connecting sleeve is provided with a ball socket matched with the shape of the connecting head, and the opening of the ball socket is downward; the connector of the rod body is sleeved in the ball socket, and the rest part of the rod body extends out of the opening of the ball socket.

preferably, the top surface of the cable clamp is provided with a connecting groove for accommodating the top corner part of the rectangular annular cable, and the cable clamp is detachably connected to the bottom of the support rod through a bolt.

Preferably, a second lug plate for connecting the second oblique cable is connected to a node at the vertex of the steel beam grid.

Preferably, the plurality of circles of the rectangular circumferential cables are sequentially arranged at equal intervals from inside to outside.

Preferably, the first and second stay wires connected to the same stay are arranged in parallel with each other.

Compared with the prior art, the invention has the advantages and beneficial effects that:

1. The invention provides a space string support steel-concrete combined floor, wherein the upper part of the floor is provided with a concrete cover plate and a steel beam grid which jointly form a rigid structure system, the lower part of the floor is supported by a cable support component, a support rod in the cable support component can play a supporting role in the vertical direction, the support rods arranged in the same circle are connected into a whole by a rectangular circumferential cable, the rectangular circumferential cable can provide prestress in the circumferential direction, meanwhile, an oblique cable arranged between the support rods can apply oblique prestress, the support rods, the rectangular circumferential cable and the oblique cable jointly form a three-dimensional space support structure system, and the space support structure system is used as an elastic support of the upper rigid structure system to play a role in reducing the stress span of the upper rigid structure, has higher structural efficiency and stronger spanning capability, and can fully play the material advantages of good compression performance of concrete materials and good tension performance of steel materials and cable materials, thereby reducing the self weight of the structure to a greater extent;

2. The space chord steel-concrete composite floor system provided by the invention has simple structure composition and definite force transmission, and the cable-rod system is arranged in a three-dimensional space, so that on one hand, the problem of out-of-plane instability of the cable-rod system in a plane system is solved; on the other hand, the stay bar and the stay cable are arranged simply, the indoor appearance is neat and simple, and a good visual effect is achieved;

3. according to the space chord support steel-concrete combined floor, the adopted stay bar realizes universal rotation by utilizing the universal steering piece arranged at the top end of the rod body, so that the prestress loss of the rectangular hoop cable in the tensioning construction stage can be effectively reduced, the actual value of the cable force of the rectangular hoop cable is ensured to be consistent with the design value, and the construction quality is ensured.

Drawings

FIG. 1 is a schematic structural diagram of a space string support steel-concrete composite floor system provided by an embodiment of the invention;

FIG. 2 is an exploded view of FIG. 1;

fig. 3 is a schematic structural view of a stay bar in a space string support steel-concrete composite floor provided by the embodiment of the invention;

FIG. 4 is an exploded view of FIG. 3;

fig. 5 is a schematic view illustrating connection between struts and steel beam grids in a space string support steel-concrete composite floor system according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of a universal steering member in a space string support steel-concrete composite floor system according to an embodiment of the present invention;

FIG. 7 is an assembly view of the top end of a rod body and a universal steering member in a space string support steel-concrete composite floor provided by an embodiment of the invention;

Fig. 8 is an assembly view of the bottom end of the rod body, the cable clamp and the rectangular circumferential cable in the space chord support steel-concrete composite floor provided by the embodiment of the invention;

Fig. 9 is a schematic connection diagram of nodes at the vertices of a second oblique cable and a steel beam grid in a spatial chord steel-concrete composite floor system according to an embodiment of the present invention;

in the above figures: 1. a concrete cover plate; 2. steel beam grids; 21. a steel main beam; 22. a steel secondary beam; 23. a second ear panel; 3. a cable support assembly; 31. a stay bar; 311. a rod body; 3111. a connector; 312. a universal steering member; 3121. a connecting rod; 3122. connecting sleeves; 31221. a half connecting sleeve body; 3123. a ball socket; 313. a cable clamp; 3131. connecting grooves; 314. a first ear plate; 315. a bolt; 32. a rectangular annular cable; 33. an oblique cable; 331. a first diagonal cable; 332. and a second oblique cable.

Detailed Description

the invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

in the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "top", "bottom", etc. indicate orientations or positional relationships based on the positional relationships shown in fig. 2, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 and 2, the embodiment of the invention relates to a spatial chord steel-concrete composite floor, which comprises a concrete cover plate 1, a steel beam grid 2 and a cable support component 3, which are sequentially arranged from top to bottom, wherein the steel beam grid 2 is attached to and fixedly connected with the bottom surface of the concrete cover plate 1, the cable support component 3 comprises a support rod 31 arranged perpendicular to the bottom surface of the concrete cover plate 1, a rectangular circumferential cable 32 arranged parallel to the bottom surface of the concrete cover plate 1, and an oblique cable 33 arranged at an angle with the bottom surface of the concrete cover plate 1; the rectangular circumferential cables 32 are arranged in a plurality of circles, the plurality of circles of rectangular circumferential cables 32 are coplanar and concentrically arranged, and the rectangular circumferential cables 32 are coaxially arranged with the bottom surface of the concrete cover plate 1; the top ends of the stay bars 31 are connected to the nodes of the steel beam grids 2, the bottom ends of the stay bars 31 are connected to the top points of the rectangular circumferential cables 32, and each top point of each circle of the rectangular circumferential cables 32 is provided with one stay bar 31; the oblique cables 33 include a first oblique cable 331 and a second oblique cable 332; the first inclined cable 331 is connected between two support rods 31 arranged at opposite vertexes of two adjacent circles of rectangular circumferential cables 32, one end of the first inclined cable 331 is connected to the bottom end of the support rod 31 positioned at the inner circle, and the other end is connected to the top end of the support rod 31 positioned at the outer circle; one end of the second diagonal cable 332 is connected to the bottom end of the stay 31 located at the outermost circle, and the other end is connected to a node at the vertex of the steel girder lattice 2 near the stay 31.

The upper part of the space string support steel-concrete combined floor system is provided with a concrete cover plate 1 and a steel beam grid 2 which jointly form a rigid structure system, the lower part of the space string support steel-concrete combined floor system is supported by a cable support component 3, in the cable support component 3, a support rod 31 can play a supporting role in the vertical direction, the support rods 31 arranged in the same circle are connected into a whole by a rectangular circumferential rope 32, the rectangular circumferential rope 32 can provide prestress in the circumferential direction, meanwhile, an oblique rope 33 arranged between the support rods 31 can apply oblique prestress, the support rods 31, the rectangular circumferential rope 32 and the oblique rope 33 jointly form a three-dimensional space support structure system which is used as an elastic support of the upper rigid structure system, has the effect of reducing the stress span of the upper rigid structure, has high structural efficiency and strong spanning capability, and can fully play the material advantages of good compression performance of concrete materials and good tension performance of steel materials and cable materials, thereby reducing the self-weight of the structure to a greater extent. Meanwhile, the spatial chord steel-concrete composite floor is simple in structural composition and clear in force transmission, and the cable-strut system is arranged in a three-dimensional space, so that the problem of out-of-plane instability of the cable-strut system in a planar system is solved; on the other hand, the stay bar and the stay cable are arranged simply, the indoor appearance is neat and simple, and a good visual effect is achieved.

In the above-mentioned space chord steel-concrete composite floor, it should be noted that the steel beam grid 2 is a common building component, and is formed by orthogonally and crossly welding a plurality of parallel steel main beams 21 and a plurality of parallel steel secondary beams 22, and the node of the steel beam grid 2 is the intersection of the steel main beams 21 and the steel secondary beams 22.

as shown in fig. 3 to 5, the brace 31 includes a rod 311, a universal steering member 312 mounted at a top end of the rod 311 and capable of universally rotating relative to the top end of the rod 311, a top end of the universal steering member 312 fixedly connected to a node of the steel beam grid 2, a cable clamp 313 arranged at a bottom end of the rod 311 and used for connecting the rectangular circumferential cable 32, and first ear plates 314 arranged on the universal steering member 312 and the cable clamp 313 and used for connecting the diagonal cable 33. When the tensioning device is installed, after the universal steering part 312 is fixedly connected to the node of the steel beam grid 2 in a welding mode and the like, the rectangular annular cable 32 is installed to the bottom end of the rod body 311 of the stay rod 31 through the cable clamp 313, the oblique cable 33 is installed in place through the first lug plate 314, then the tensioning device is adopted to pre-tension the rectangular annular cable 32 or the oblique cable 33, and the prestress loss of the rectangular annular cable 32 during tensioning can be reduced through the rotation of the rod body 311 of the stay rod 31 relative to the universal steering part 312 during tensioning. In this embodiment, the universal steering part 312 installed at the top end of the rod body 311 is utilized to realize universal rotation of the adopted stay bar 31, so that the prestress loss of the rectangular circumferential cable 32 in the tensioning construction stage can be effectively reduced, the actual value of the cable force of the rectangular circumferential cable 32 is ensured to be consistent with the design value, and the construction quality is ensured.

In this embodiment, the top end of the rod 311 and the universal steering component 312 are connected in a universal rotation manner as shown in fig. 6 and 7, the top end of the rod 311 is provided with a connector 3111, and the connector 3111 is in a segment shape larger than a hemisphere; the universal steering component 312 comprises a connecting rod 3121 with the top end fixedly connected to the node of the steel beam grid 2, the bottom end of the connecting rod 3121 is connected with a connecting sleeve 3122, the connecting sleeve 3122 has a ball socket 3123 matched with the shape of the connecting head 3111, the opening of the ball socket 3123 is downward; the connector 3111 of the rod 311 is sleeved in the socket 3123, and the rest of the rod 311 extends out of the opening of the socket 3123. Through the rotational fit between the connector 3111 and the socket 3123 of the connection sleeve 3122, the rod 311 can rotate 360 ° around its axis, and at the same time, the rod 311 can deflect within the opening of the socket 3123. It should be noted that the connecting sleeve 3122 is formed by welding two symmetrically disposed connecting sleeve halves 31221, when assembling the universal steering element 312 and the rod body 311, the two connecting sleeve halves 31221 are firstly buckled on the surface of the connecting head 3111, the two connecting sleeve halves 31221 are welded to form the complete connecting sleeve 3122, the connecting rod 3121 is welded to the top end of the connecting sleeve 3122, and after cooling, grease is introduced between the connecting head 3111 of the rod body 311 and the assembled connecting sleeve 3122.

In this embodiment, the bottom end of the rod 311 is connected to the cable clamp 313 and the rectangular circumferential cable 32 in a manner shown in fig. 8, a connecting groove 3131 for accommodating a top corner portion of the rectangular circumferential cable 32 is formed in a top surface of the cable clamp 313, the connecting groove 3131 is in a round angle shape, and the cable clamp 313 is detachably connected to the bottom of the stay 31 through a bolt 315. During assembly, the top corner of the rectangular circumferential cable 32 is partially clamped into the connecting groove 3131 of the cable clamp 313, and the cable clamp 313 is initially screwed to the bottom end of the rod body 311 through the bolt 315. It will be appreciated that other configurations of the cable clamp 313 may be used by those skilled in the art, as long as the rectangular circumferential cable 32 can be connected to the bottom end of the rod body 311.

In this embodiment, the connection manner between the second oblique cables 332 and the nodes at the vertices of the steel beam mesh 2 is as shown in fig. 9, and the second ear plates 23 for connecting the second oblique cables 332 are connected to the nodes at the vertices of the steel beam mesh 2. When assembling, the second oblique cables 332 are connected to the second ear plate 23, and it is understood that a person skilled in the art may connect the second oblique cables 332 to the nodes at the top of the steel beam grid 2 in other ways as long as the connection is ensured to be firm.

In addition, in order to make the structure of the cable support component 3 in the space chord steel-concrete composite floor more stable and the support effect better, as shown in fig. 2, a plurality of circles of rectangular circumferential cables 32 are sequentially arranged at equal intervals from inside to outside. Further, as shown in fig. 2, the first and second diagonal cables 331 and 332 connected to the same stay 31 are arranged in parallel with each other.

The construction process of the space chord steel-concrete composite floor system comprises a steel structure assembling stage, a stay cable tensioning stage and a concrete slab construction stage; the specific construction method comprises the following steps:

(1) And (3) assembling a steel structure: installing the steel main beam 21 and the steel secondary beam 22 in place in two orthogonal directions, and performing bolted welding connection to complete the splicing of the steel beam grids 2; according to the arrangement condition of the stay bars 31, the top ends of the pre-assembled stay bars 31 are welded on the nodes of the steel beam grids 2; four top corners of the rectangular annular cable 32 are connected to the bottom ends of the rod bodies 311 of the four support rods 31 in the same circle through cable clamps 313; connecting one end of a first oblique cable 331 to the first ear plate 314 at the bottom end of the inner ring stay 31, connecting the other end of the first oblique cable 331 to the first ear plate 314 at the top end of the outer ring stay 31 corresponding to the inner ring stay 31, and installing the first oblique cables 331 from inside to outside one by one until all the first oblique cables 331 are installed; connecting one end of a second oblique cable 332 to the first ear plate 314 at the bottom end of the outermost ring of stay bars 31, and connecting the other end of the second oblique cable 332 to the second ear plate 23 at the node at the top point of the steel beam grid 2 corresponding to the outermost ring of stay bars 31, and installing one by one until all the second oblique cables 332 are installed; pre-clamping the cable clamp 313 at the bottom of the rod body 311 from inside to outside in a circle-by-circle manner;

(2) and (3) tensioning the stay cable: a tensioning device is adopted to pre-tension the rectangular circumferential cables 32 or the oblique cables 33, so that the structure has certain rigidity; after the pre-tensioning is finished, the prestress application to the rectangular annular cable 32 or the oblique cable 33 is gradually finished from inside to outside in a graded tensioning mode; after all stretching work is finished, all cable clamps 313 at the bottom of the rod body 311 are clamped;

(3) the concrete slab construction stage: installing a template for pouring the concrete cover plate 1 on the top surface of the steel beam grid 2, binding steel bars, and pouring concrete to obtain the concrete cover plate 1; and after the concrete curing is finished, removing the template to finish the whole construction of the floor system structure.